OK so now I have this:

xPopupEntryPaintingMode .image
xPopupTitlePaintingMode .image
xPopupBottomPaintingMode .image
xPopupSeparatorPaintingMode .image
xPopupArrowPaintingMode .image
xPopupMinWidth 130
xPopupMaxWidth 180

xPopupActiveEntryImage popup_selected.png
xPopupActiveEntryImageLeftEdge 3
xPopupActiveEntryImageRightEdge 3
xPopupEntryImage popup_normal.png
xPopupEntryImageLeftEdge 3
xPopupEntryImageRightEdge 3
xPopupTitleImage popup_top.png
xPopupBottomImage popup_bottom.png
xPopupSeparatorImage popup_seperator.png
xPopupArrowImage popup_arrowB1.png
xPopupActiveArrowImage popup_arrowB2.png


but the top and bottom still do not work. the arrows and separator do though. Any idea?